Attachment for picture and other image projecting apparatus.



F. J. REILLY. ATTACHMENT FOR PICTURE AND OTHER IMAGE PROJEGTINGAPPARATUS. APPLIOATIDN FILED MAY 5, 1910.

994,276, Patented June 6,1911.

WITNESSES:

gwmmw 5- Z %wmwl O /Q ATTORNEYS UNITED STATES PATENT OFFICE.

FREDERICK J. REILLY, OF NEW YORK, N. Y.

ATTACHMENT FOR PICTURE AND OTHER IMAGE PROJECTING APPARATUS.

To all whom it may concern:

Be it known that I, FREDERICK J. REILLY, a citizen of the United States,and resident of the borough of Manhattan, city, county, and State of NewYork, have invented certain new and useful Improvements in Attachmentsfor Picture and other Image Projecting Apparatus, of which the followingis a specification.

My invention relates to attachments for picture and other imageprojecting apparatus and has for its object to provide an attachment ofthis description by the use of which pictures or other images may beprojected on a screen so as to be clearly and distinctly visible withoutmaking it necessary to darken the room in which the at tachment andapparatus are being used. Heretofore to secure a distinctand clearreproduction of the image it has usually been necessary to darken theroom in which the demonstration was taking place. Owing to existingcircumstances, it is ofttimes almost impossible, particularly during daylight, to secure the required degree of-darkness necessary to a perfectreproduction and furthermore in many instances and for various reasonsthis darkness is extremely objectionable and ofttimes dangerous.

The particular aim of my invention is to overcome these objectionablefeatures and to make it possible to secure a clear and distinctreproduction in a brightl lighted 0i)1n'1 either during daylight ora ternight- Another object of my improvement is to so construct my particularattachment as to make it easily colla sible and capable of bein foldedinto smal compass so as to be readily carried or shipped about.

My invention will be full described hereinafter and the features onovelty will be pointed out in the appended claims.

Reference is to be had to the accompanying drawings in which-- Figure 1is a side elevation of my im proved apparatus in operative position;Fig. 2 is a horizontal section-thereof on the line 2-2 of Fig. 1; Fig. 3is an elevation showing m improved attachment in its folded condition;and Fig. 4 is a front view thereof.

The attachment comprises a frame 1 of metal or other suitablelighaterial the opening of which is covered by'a screen 2 of translucentmaterial preferably in the nature of a glass plate secured in positionby means Specification of Letters Patent.

Application filed May 5, 1910.

Patented June 6, 1911. Serial No. 559,583.

joint 9 so that said joint is capable of being broken only in onedirection and is firmly held against movement in the other direction.These connected levers 6, of which I preferably provide two sets,arranged on opposite sides of said bellows, when extended thus act inthe nature of single stiff levers and maintain the bellows 4: firmly inits extended position. The said bellows may be easily folded by breakingthe joint 9 as shown in Fig\ 3. A second folding bellows 10 preferablyof reduced cross section has its one end secured to the inside edge ofthe frame 1 and its opposite end fastened to a frame 11 similar to theframe 5 and projects" rearwardly from the frame 1 as illustrated in Fig.2. This bellows 10 is maintained in its extended position by means oflevers 12 pivotally connected at 13 to lugs 14 car ried by the frame 1and at 15 to the frame 11. These levers are connected together by a rulejoint 16 and operate in the same manner as do the levers 6. A cover 17provided with a central reduced opening 18 is secured to the outsidesurface of the frame 11 in any suitable manner as by means of screws orsimply by gluing.

To secure the attachment in its folded condition I provide a strap 19secured at 20 to the frame 11 and having an aperture 21 near its freeend adapted for engagement with a button 22 carried by the frame 5. Thusafter the bellows have been folded the aperture of the strap is engagedwith the button 22 as indicated in Fig. 3 and prevents expansivemovement of said bellows.

To cover the opening of the frame 5 and protect the screen 2 againstinjury when the attachment is not in use either in its folded orunfolded condition I provide a preferably flexible cover 23 having itsone edge secured to the one edge of the frame 5 and provided adjacent tothe remainder of its periphery with spaced openings adapted to beengaged with similarly spaced buttons 24 located on the said frame 5.When it is desired to utilize said cover it is simply folded down overthe opening of the frame 5 and the openings thereof and buttons 24engaged with each other to secure said cover in position to completelycover the said opening and thus protect the interior of the attachmentand particularly the screen 2 against injury.

In use theattaclnnent in its extended condition may be set on a table orother support 25 the bellows 4 resting thereon and the end of thereduced bellows 10 being supported 011 a shelf 26 which may form part ofa second smaller support 27 located on the table 25. This support 27also serves as a carrier on which to mount the lamp or other projectingapparatus 28 the lens tube 29 of which is arranged axially of theattachment and with its end in close proximity to the opening 18. Inthis position of the parts the cover 23 is folded back as indicated inFig. 1 so as to leave the opening of the frame 5 free and the screen 2visible from the front of the attachment. It is to be understood thatthe image is projected on to the screen 2 which is practically indarkness so that the reproduction is clear and distinct even though theroom in which the demonstration is taking place is highly illuminated.That is the forwardly extending bellows 4 forms a hood for shading thefront surface of the screen 2 and the rearwardly extending bellows 10serves as a hood to shade the rear surface of said screen. Furthermorethe rays of light being directly projected from the rear of the screeninto the darkness of the interior of said bellows 10 are not dimmed bythe surrounding light of the room so that even in broad daylight aclearly defined image is reproduced on the screen '2. In other words thetwo bellows 4 and 10 form a substantially continuous open-ended channelor tube at an intermediate point of which the screen 2 is secured. Owingto the fact that in the illustration the screen is of translucent glassthe image although projected on the rear of said screen is visible tothe audience from the front. This screen -instead of being a glass platemay be of any translucent material such as tracing linen, tracing paperor ordinary fabric.

My invention may be used with an ordinary stereopticon or with a movingpicture or other image projecting machine and is extremely valuable foruse in connection with lectures in school rooms. When my invention isused the operator or the lecturer, and the audience are in the light andnot in darkness as in ordinary cases so that the lecturer has theadvantage of seeing his audience and the audience the lecturer.Furthermore in the case of a disturbance of any kind the cause mayquickly be found and remedied and the tendency to a panic which isalways present in gatherings of this kind may be averted. After thelecture or other demonstration has been finished the attachment may befolded into a small compass and either stored away or carried orotherwise transmitted to some other location.

It will be noted that the bellows 10 corresponds substantially in crosssectional area to the surface area of the screen so that the light isconfined directly to said screen and is not diffused over unnecessarysurface as might be the case if said bellows were larger. Further thebellows 4 is larger in cross section than the area of the plate 2 so asto provide the largest possible extent of viewto the audience. It willbe seen that the' aperture 18 is comparatively small and that the cover17 prevents any light other than the rays from the projecting apparatusfrom entering the interior of the bellows 10 from the rear. If desiredinstead of having the cover 17 the frame 10 itself may be formed with areduced opening corresponding to the opening 18.

Instead of supporting the end of the reduced bellows 10 on a shelf asshown in Fig. 1 the said bellows may be provided adjacent to its freeend with a downwardly projecting standard 30 in which is journaled aroller 31. This standard with its roller is of the required length toproperly support said bellows in position on the table or other supportand does away with the necessity for the shelf 26 or an equivalentsupport.

Various changes in the specific construction shown and described may bemade within the scope of the claims without departing from the spirit ofmy invention.

I claim:

1. An attachment of the kind described comprising a screen on which theimage is projected and h gg ds extending in opposite directions fromsaidscreen for shading opposite surfaces thereof, said hoods being ofdifferent cross sectional areas.

2. An attachment of the kind described comprising a screen on which theimage is projected and foldin hoods extending in opposite directions romsaid screen for shading opposite surfaces thereof and means formaintaining said hoods in their extended condition.

3. An attachment of the kind described comprising a screen on which theimage is projected and folding hoods extending in opposite directionsfrom said screen for shading opposite surfaces thereof and means formaintaining said hoods in their extended condition, and a cover forcovering the open end of said forwardly extending hood.

4. An attachment of the kind described comprising a screen on which theimage is projected and hoods extending in opposite directions from saidscreen for shading opposite surfaces thereof the forwardly extendinghood being provided at its front I my hand in the presence of twosubscribing end with an opening corresponding in size Witnesses.

substantiall to the cross sectional area of 1 said hood i i bile therearwm'dly extending BREDERICK REILLY hood is provided at its rear endwith a re- Witnesses: duced opening. JOHN A. KEHLENBECK,

In testimony whereof I have hereunto set G. V. RASMUSSEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

